Delay control switch and hopper for feeding finely divided materials

Claim 1

MEANS FOR MAINTAINING THE LEVEL OF FINELY DIVIDED MATERIAL BETWEEN SPECIFIED LEVELS IN A BIN COMPRISING: (1) A BIN, (2) AN OPENING AT THE BOTTOM OF THE BIN, (3) A FIRST CONVEYOR ADAPTED TO REMOVE MATERIAL FROM THE BIN THROUGH SAID BOTTOM OPENING, (4) A SECOND CONVEYOR ADAPTED TO SUPPLY SAID MATERIAL TO SAID BIN AT A DEFINED DISCHARGE POINT AT THE TOP OF SAID BIN, (5) A GENERALY VERTICAL FIRST PARTITION WITHIN SAID BIN DIVIDING SAID BIN INTO A MAIN BIN AND A CONTROL BIN, (A) SAID BOTTOM OPENING AND SAID DISCHARGE POINT BEING WITHIN SAID MAIN BIN, (B) SAID CONTROL BIN BEING OPEN TO SAID MAIN BIN ONLY AT THE TOP AND BOTTOM OF SAID FIRST PARTITION, (6) CONTROL MEANS FOR SAID SECOND CONVEYOR, INCLUDING A SWITCH HAVING A PADDLE ACTUATOR DISPOSED IN SAID CONTROL BIN, (7) SAID PADDLE HAVING A FRONT AND A BACK EXPOSED TO THE CONTENTS OF SAID CONTROL BIN AND BEING ADAPTED TO ACTUATE SAID SWITCH TO THE "OFF" POSITION UPON FILLING OF SAID CONTROL BIN IN FRONT OF SAID PADDLE BEYOND A PREDETERMINED HIGH LEVEL AND BEING ADAPTED TO ACTUATE SAID SWITCH TO THE "ON" POSITION UPON EMPTYING OF SAID CONTROL BIN BEYOND A PREDETERMINED LOWER LEVEL IN FRONT OF SAID PADDLE, (8) MEANS FOR OPERATING SAID FIRST CONVEYOR INDEPENDENTLY OF SAID CONTROL MEANS, (9) SAID PADDLE BEING MOUNTED SUBSTANTIALLY AT RIGHT ANGLES TO SAID FIRST PARTITION (10) THE LOWER MARGIN OF SAID FIRST PARTITION EXTENDING GENERALLY HORIZONTALLY IN THE REGION AHEAD OF SAID PADDLE, (11) SAID FIRST PARTITION HAVING AN OPENING IN THE REGION BEHIND SAID PADDLE AND ABOVE THE LOWER MARGIN OF SAID PARTITION, (12) WHEREBY DURING OPERATION OF SAID FIRST CONVEYOR THE MATERIAL IS REMOVED FIRST FROM THE MAIN BIN, THEN FROM THE CONTROL BIN BEHIND THE PADDLE AND LASTLY FROM THE CONTROL BIN IN FRONT OF THE PADDLE.